MINFLUX Microscopy Disturbance Correction
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Solution Overview
Problem
High-resolution microscopic imaging methods like MINFLUX face challenges in maintaining stability due to short-term disturbances such as vibrations and air currents, which affect the precise localization of fluorescence dye molecules, leading to motion blur and reduced image quality.
Innovation Solution
A method and laser scanning microscope that detect disturbances during data acquisition and adjust the illumination and detection of fluorescence photons using weighting factors, allowing for accurate localization of fluorescence dye molecules by accounting for and mitigating the impact of these disturbances, even when they exceed certain limit values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution imaging methods like MINFLUX are used to achieve nanometer-scale localization accuracy, then the resolving power increases from diffraction-limited (approx. 250 nm) to a few nanometers, but the system becomes extremely sensitive to short-term disturbances such as vibrations, air currents, and temperature fluctuations, which cause motion blur and reduce image quality
Solution Approach 1:
The patent implements a feedback mechanism where the measured position of the fluorescence dye molecule is used to adjust the scan positions in subsequent iterations. The system continuously refines the localization by using the measured position information to guide the next measurement round, thereby compensating for disturbances and maintaining high localization accuracy despite environmental noise
Solution Approach 2:
The patent performs preliminary rough localization using diffraction-limited imaging before applying the MINFLUX method. This preliminary action provides an initial position estimate that guides the subsequent high-precision scanning, allowing the system to achieve nanometer-scale accuracy more efficiently and with reduced sensitivity to disturbances during the refinement stages
2Measurement precision
If the measurement duration is increased or the excitation light strength is increased to reduce localization error through iterative refinement, then the localization accuracy improves, but the system exposure time increases and the risk of disturbance-induced motion blur increases
Solution Approach 1:
The patent applies partial action by performing a limited number of iterative refinement steps rather than continuing until complete convergence. The system achieves sufficient localization accuracy with a small number of iterations (typically 2-5), avoiding the time loss that would result from excessive iterative refinement while still attaining nanometer-scale precision
Solution Approach 2:
The patent uses periodic scanning of the fluorescence molecule at multiple discrete positions around the expected location. By systematically cycling through these scan positions and accumulating fluorescence signal measurements, the system achieves high localization accuracy in a fixed, predictable time frame rather than requiring continuous prolonged exposure
3Stability of the object's composition
If passive and actively damped table systems are used to minimize vibrations, then the mechanical stability improves, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical vibration isolation systems with an optical measurement and correction approach. Instead of relying on passive and active mechanical damping tables, the system uses fluorescence microscopy to detect and computationally correct for the effects of vibrations, thereby achieving high stability without the complexity of sophisticated mechanical isolation systems
4Stability of the object's composition
If high-quality control and air-conditioning technology are used to reduce temperature fluctuations, then the thermal stability improves, but the device complexity and cost increase
Solution Approach 1:
The patent replaces complex thermal control systems with an optical measurement approach. Instead of using high-quality air-conditioning and thermal control equipment to maintain constant temperature, the system uses fluorescence microscopy to detect thermal drift effects and computationally corrects for them, thereby achieving thermal stability without the complexity and cost of sophisticated environmental control systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables highly accurate determination of fluorescence dye molecule locations with improved localization accuracy below the diffraction limit, enhancing the quality of high-resolution images by accounting for and managing short-term disturbances, thereby reducing motion blur and improving image stability.
Implementation Method 1
illumination of an individual, spatially isolated fluorescence dye molecule with an intensity distribution of excitation light... excited to emit fluorescence light
Data Source
AI summary
The present disclosure is directed to a method of disturbance correction and to a laser scanning microscope carrying out this method. Specifically, it is directed to an image recording method according to the MINFLUX principle, in which a spatially isolated fluorescence dye molecule is illuminated at a sequence of scan positions by an intensity distribution with a local intensity minimum, and the number of fluorescence photons emitted by the fluorescence dye molecule is detected at each of the scan positions. The location of the molecule is determined with a high spatial resolution from the scan positions and the numbers of fluorescence photons. A disturbance is captured when illuminating the fluorescence dye molecule and detecting the fluorescence light, said disturbance being considered in corrective fashion when determining the location of the fluorescence dye molecule.